From owner-freebsd-bugs Sat Dec 25 15:46:34 1999 Delivered-To: freebsd-bugs@freebsd.org Received: from skynet.ctr.columbia.edu (skynet.ctr.columbia.edu [128.59.64.70]) by hub.freebsd.org (Postfix) with SMTP id 1D40514C94; Sat, 25 Dec 1999 15:46:29 -0800 (PST) (envelope-from wpaul@skynet.ctr.columbia.edu) Received: (from wpaul@localhost) by skynet.ctr.columbia.edu (8.6.12/8.6.9) id SAA17183; Sat, 25 Dec 1999 18:50:29 -0500 From: Bill Paul Message-Id: <199912252350.SAA17183@skynet.ctr.columbia.edu> Subject: Re: kern/15689: gdb on core-dump does not work on current-19991225 To: assar@sics.se (Assar Westerlund) Date: Sat, 25 Dec 1999 18:50:28 -0500 (EST) Cc: bugs@freebsd.org, sos@freebsd.org In-Reply-To: <5logbe6bz5.fsf@assaris.sics.se> from "Assar Westerlund" at Dec 25, 99 08:45:34 pm X-Mailer: ELM [version 2.4 PL24] Content-Type: text Content-Length: 1570 Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Of all the gin joints in all the towns in all the world, Assar Westerlund had to walk into mine and say: > ata-pci0: at device 7.1 on pci0 > ata-pci0: Busmastering DMA supported > ata0 at 0x01f0 irq 14 on ata-pci0 > ata-isa0: already registered as ata0 > ad0: ATA-3 disk at ata0 as master > ad0: 775MB (1587600 sectors), 1575 cyls, 16 heads, 63 S/T, 512 B/S > ad0: 16 secs/int, 1 depth queue, DMA This is your problem. Crash dumps are broken with the ata driver. Again. No, it's not a gdb problem: gdb -k /kernel /dev/mem still works fine. I just tested it on my Dec. 21st snapshot on my laptop (I'm still trying to track down some bugs in the USB code) and had the same problem. I changed to using a kernel with the wd driver and it worked again. Basically, the crash dump generated by the ata driver is corrupt somehow. Unfortunately, I can't offer a fix: I have no ATA clues. I'm cc'ing this to sos@freebsd.org; hopefully he'll be able to track the problem down. -Bill -- ============================================================================= -Bill Paul (212) 854-6020 | System Manager, Master of Unix-Fu Work: wpaul@ctr.columbia.edu | Center for Telecommunications Research Home: wpaul@skynet.ctr.columbia.edu | Columbia University, New York City ============================================================================= "It is not I who am crazy; it is I who am mad!" - Ren Hoek, "Space Madness" ============================================================================= To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message